Elucidating the photocatalytic mechanism of biomass-derived carbon dots nanocomposite for efficient degradation of MB and CR dyes: Insights into protein binding applications

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2024-08-30 DOI:10.1016/j.diamond.2024.111547

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Abstract

This study introduces an environmentally sustainable method for synthesizing a nanocomposite using carbon quantum dots derived from green tea waste and zinc oxide. The single-step hydrothermal process not only addresses waste management but also yields a versatile nanocomposite with diverse applications. Rigorous characterization reveals its morphology, crystallinity, phase identification, structural behavior, optical properties, and chemical composition. Incorporating carbon quantum dots into the zinc oxide matrix reduces the band gap to 1.87 eV, enhancing charge separation and light-harvesting. This modification significantly boosts photocatalytic activity, achieving degradation efficiencies of 95.16 % for methylene blue (MB) and 93.21 % for congo red (CR) under visible light. The effects of pH, contact time, and photocatalyst concentration on dye degradation were explored. The nanocomposite, exhibiting both adsorption and photocatalytic performance, is poised for broad applications. Fluorescence quenching studies with lysozyme protein provide insights into potential applications across diverse fields, highlighting its environmentally friendly and multifunctional attributes.

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阐明生物质衍生碳点纳米复合材料高效降解 MB 和 CR 染料的光催化机理：蛋白质结合应用的启示

本研究介绍了一种利用从绿茶废料中提取的碳量子点和氧化锌合成纳米复合材料的环境可持续方法。单步水热法不仅解决了废物管理问题，还产生了用途广泛的纳米复合材料。严格的表征揭示了其形态、结晶度、相鉴别、结构行为、光学特性和化学成分。在氧化锌基体中加入碳量子点可将带隙降至 1.87 eV，从而增强电荷分离和光收集能力。这种改性大大提高了光催化活性，在可见光下，亚甲基蓝（MB）和刚果红（CR）的降解效率分别达到 95.16% 和 93.21%。研究还探讨了 pH 值、接触时间和光催化剂浓度对染料降解的影响。该纳米复合材料同时具有吸附和光催化性能，有望得到广泛应用。溶菌酶蛋白的荧光淬灭研究为其在不同领域的潜在应用提供了见解，突出了其环境友好和多功能的特性。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.